1 files changed, 128 insertions, 0 deletions
diff --git a/src/data/things/homepage-layout/HomepageLayout.js b/src/data/things/homepage-layout/HomepageLayout.js
new file mode 100644
index 00000000..e144bf80
--- /dev/null
+++ b/src/data/things/homepage-layout/HomepageLayout.js
@@ -0,0 +1,128 @@
+const HOMEPAGE_LAYOUT_DATA_FILE = 'homepage.yaml';
+
+import {V} from '#composite';
+import Thing from '#thing';
+import {empty} from '#sugar';
+import {isStringNonEmpty, validateArrayItems} from '#validators';
+
+import {exposeConstant} from '#composite/control-flow';
+import {contentString, thingList} from '#composite/wiki-properties';
+
+export class HomepageLayout extends Thing {
+  static [Thing.friendlyName] = `Homepage Layout`;
+  static [Thing.wikiData] = 'homepageLayout';
+  static [Thing.oneInstancePerWiki] = true;
+
+  static [Thing.getPropertyDescriptors] = ({HomepageLayoutSection}) => ({
+    // Update & expose
+
+    sidebarContent: contentString(),
+
+    navbarLinks: {
+      flags: {update: true, expose: true},
+      update: {validate: validateArrayItems(isStringNonEmpty)},
+      expose: {transform: value => value ?? []},
+    },
+
+    sections: thingList(V(HomepageLayoutSection)),
+
+    // Expose only
+
+    isHomepageLayout: exposeConstant(V(true)),
+  });
+
+  static [Thing.yamlDocumentSpec] = {
+    fields: {
+      'Homepage': {ignore: true},
+
+      'Sidebar Content': {property: 'sidebarContent'},
+      'Navbar Links': {property: 'navbarLinks'},
+    },
+  };
+
+  static [Thing.getYamlLoadingSpec] = ({
+    documentModes: {allInOne},
+    thingConstructors: {
+      HomepageLayout,
+      HomepageLayoutActionsRow,
+      HomepageLayoutAlbumCarouselRow,
+      HomepageLayoutAlbumGridRow,
+      HomepageLayoutRow,
+      HomepageLayoutSection,
+    },
+  }) => ({
+    title: `Process homepage layout file`,
+    file: HOMEPAGE_LAYOUT_DATA_FILE,
+
+    documentMode: allInOne,
+    documentThing: document => {
+      if (document['Homepage']) {
+        return HomepageLayout;
+      }
+
+      if (document['Section']) {
+        return HomepageLayoutSection;
+      }
+
+      if (document['Row']) {
+        switch (document['Row']) {
+          case 'actions':
+            return HomepageLayoutActionsRow;
+          case 'album carousel':
+            return HomepageLayoutAlbumCarouselRow;
+          case 'album grid':
+            return HomepageLayoutAlbumGridRow;
+          default:
+            throw new TypeError(`Unrecognized row type ${document['Row']}`);
+        }
+      }
+
+      return null;
+    },
+
+    connect(results) {
+      if (!empty(results) && !(results[0] instanceof HomepageLayout)) {
+        throw new Error(`Expected 'Homepage' document at top of homepage layout file`);
+      }
+
+      const homepageLayout = results[0];
+      const sections = [];
+
+      let currentSection = null;
+      let currentSectionRows = [];
+
+      const closeCurrentSection = () => {
+        if (currentSection) {
+          for (const row of currentSectionRows) {
+            row.section = currentSection;
+          }
+
+          currentSection.rows = currentSectionRows;
+          sections.push(currentSection);
+
+          currentSection = null;
+          currentSectionRows = [];
+        }
+      };
+
+      for (const entry of results.slice(1)) {
+        if (entry instanceof HomepageLayout) {
+          throw new Error(`Expected only one 'Homepage' document in total`);
+        } else if (entry instanceof HomepageLayoutSection) {
+          closeCurrentSection();
+          currentSection = entry;
+        } else if (entry instanceof HomepageLayoutRow) {
+          if (currentSection) {
+            currentSectionRows.push(entry);
+          } else {
+            throw new Error(`Expected a 'Section' document to add following rows into`);
+          }
+        }
+      }
+
+      closeCurrentSection();
+
+      homepageLayout.sections = sections;
+    },
+  });
+}